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Organization, Basis of Presentation, and Summary of Significant Accounting Policies - Fair Value of Assets and Liabilities (Details) - USD ($)
$ in Thousands
May 26, 2019
May 27, 2018
Assets:    
Investment in non-public company $ 61,100 $ 66,500
Level 1 | Fair Value, Measurements, Recurring    
Assets:    
Interest rate swap contracts 0 0
Investment in non-public company 0 0
Total assets 0 0
Liabilities:    
Interest rate swap contracts 0 0
Contingent consideration liability 0 0
Total liabilities 0 0
Level 2 | Fair Value, Measurements, Recurring    
Assets:    
Interest rate swap contracts 644 1,529
Investment in non-public company 0 0
Total assets 644 1,529
Liabilities:    
Interest rate swap contracts 482 0
Contingent consideration liability 0 0
Total liabilities 482 0
Level 3 | Fair Value, Measurements, Recurring    
Assets:    
Interest rate swap contracts 0 0
Investment in non-public company 61,100 66,500
Total assets 61,100 66,500
Liabilities:    
Interest rate swap contracts 0 0
Contingent consideration liability 500 4,000
Total liabilities $ 500 $ 4,000